Help about Xlib Library in Python

[Alexander Kapps]

On 16.12.2011 05:55, 阮铮 wrote:
> Hi,
>
> A question about Xlib Library in Python troubled me for several days
> and I finally found this email list. I hope someone could answer my
> question. I think it is easy for experienced user.
>
> I would like to write a small script to response my mouse click in
> root screen and write something in the terminal. My script is like
> this, but it does not work in my computer.
>
> from Xlib import X
> import Xlib.display
>
> def main():
> display = Xlib.display.Display()
> root = display.screen().root
> root.change_attributes(event_mask=
> X.ButtonPressMask |
> X.ButtonReleaseMask)
> while True:
> event = root.display.next_event()
> print "1"
> if __name__ == "__main__":
> main()
>
>
> Any hints are welcome
> Thank you!
>
> Ruan zheng
>

You haven't said *how* your script is not working and what 
distro/desktop-environment you use, but I suspect, that your script 
collides with the window manager.

Most window managers occupy the root window for them self, and even 
display another window above the root window (for the wallpaper, the 
desktop icons, etc.), so your clicks never reach the root window, 
but whatever the window manager draws as the background.

If you run your script in a plain and naked X "session" with nothing 
but an xterm *and no window manager*, your script will probably work.